Swingline S.F. 13 Heavy Duty 0.375 Inch Leg Staples, 60 Sheet Capacity, 5,000 Staples per Box, Silver (S7035358E) Heavy duty S.F. 13 staples Leg lengths of 0.375 Inch Sharp chisel points for less jamming Staple up to 60 sheets of 20 pound paper at a time 1 box containing 5,000 staples